Edge treating machine



3 Sheets-Sheet 1 Filed Dec. 30, 1944 I BUGn'tOTJ Jo se 'bh, Fossa GONISGGCSOTL l2, J, FOSSA T AL EDGE TREATING MACHINE I Filed D86. 30, 1944 3 Sheets-Sheet 2 April 12, 1949. J, FOSSA' ETAL 2,466,802

EDGE TREATING MACHINE Filed Dec. 50, 1944 3 Sheets-Sheet s' 0 w M t o n F M evnf a u @N a M w a J .L 6 2 Z J km w w Av: k f vg F 0 gm 6 W A 4 WWW M u 3 mm 1 y M a Patented Apr. 12, 1949 EDGE TREATING MACHINE Joseph Fossa, Salem,

and Leo N. Isaacson, Brookline, Mass; said Fossa assignor to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey; Esther B. Isaacson administratrix of said Leo N. Isaacson, deceased Application December 30, 1944, Serial No. 570,730

3 Claims. (01. 154-42) This invention relates to a machine for uniting the superposed edges of multi-layer plastic materials and is illustrated herein as embodied in a machine for smoothing and securing together the edges of superposed layers of plastic screening.

For use in shoes which are to be employed in climates where there are extremes of temperature, either of heat or cold, it is desired to provide loose or slip soles which may be worn inside the shoe and which will serve to insulate the foot from the bottom of the shoe itself. Beneficial effects are obtained when such a slip sole is employed in tropical climates because of the added ventilation, the insulation against heat, and the possibility of taking up excessive perspiration. It is found in connection with shoes made for soldiers, for example, that it is highly desirable to have such slip soles which can be removed, cleaned and dried, and it has been found that a screening having a mesh comparable to that used in ordinary fly screens and which is made from filaments of plastic material, such, for example, as the one having the trade name of Saran, is very suitable for such slip soles for the reason that it is pliable, absorbent, light and readily cleaned. To be effective, such soles must be made up of a plurality of layers, and five layers are frequently employed. The cutting of sole-shaped pieces from such screening will, as will be obvious, I' leave ragged edges having projecting filaments which are undesirable in the finished article and which must be bound together in some way to make the sole serviceable. It has been proposed to apply binding to the edge of the soles, but this involves an added cost of material and is not entirely satisfactory. On the other hand, if the plastic material is softened and then compacted so as to secure together the various layers, a smooth edge is provided for the sole and a strong unitary article involving only one kind of material results.

One important object of our invention is to provide an improved machine for treating the edges of such multi-layer plastic materials, to unite them as by fusing.

An important feature of the invention resides in the employment of compacting means, such as a vibratory hammer acting upon the softened edges of the work to consolidate them and which has a depending neck against which the softened edge of the work rests and by which it will be rubbed to smooth it while at the same time the neck serves as a gage for guiding the edge of the work past the heat-applying means.

These and other features of the invention will 2 best be understood from consideration of the following description taken in connection with the accompanying drawings, in which Fig. 1 is a front elevation of the machine, with a portion of the table broken away to expose the hammer and anvil;

Fig. 2 is a vertical section, on the line IIII of Fig. 1, but on a larger scale, to show the presserfoot slide;

Fig. 3 is a plan view of the operating tools of the machine;

- the invention; and

Fig. 9 is a side elevation of the work-engaging parts thereof.

The machine has a base (not shown) from which there projects laterally an arm ill to support a work table l2 and from which there also projects an overhanging hollow arm l4 to support a presser mechanism. It embodies a frame and driving mechanism of the type illustrated in Letters Patent of the United States No. 1,702,598, granted February 19, 1929, upon the application of P. R. Glass, to which reference may be made for a disclosure of parts not herein fully shown and described.

In treating a piece of work in the form of a sole S, successive portions of the periphery thereof are presented to a source of heat which in one form herein illustrated is provided by a blast of hot air issuing from a nozzle 20 supported indirectly by an arm 22 attached by screws 24 to the work table I2 in a position outside the bounds of the work. Carried on this arm and supported by means of clamps 2B and a rod 28 is a mixing chamber 30 to which air is supplied through a pipe 32, and illuminating gas is supplied through a pipe 34, the quantities of each being controlled by hand cocks 48. This mixing chamber is connected to a tubular combustion chamber 36 by a pipe 38. On the chamber there is sleeved a door 40 held against endwise movement by collars 42.

This door is manually rotatable by a handle 44 to cause an opening 45 (Fig. 3) therein to register with a similar'opening (Fig. 1) in the chamber wall so that the gas may be ignited. From the t e" lifting of the Progressive movement of the work past thisheating device is effected by a hammerandanvilfeed mechanism of the type illustrated in the patent and comprising an anvil 60 carried by an arm 62 mounted on a rocking sleeve 64'. The axis of this sleeve 64 is at right angles to the edge of the work at the zone of contact of the tools therewith and hence is also at right angles to the direction of feed. The uppe'r'surface of the anvil 60 is provided with grooves 65 (Fig. 4) extending in the direction of movement of the work fora purpose which will later appear. A hammer 66 cooperating with the anvil to grip the work is mounted on the upper end of an arm 68 integral with a pivot stud I journaled in the rocking arm 62-; This stud is parallel to the edge of the work at the zone of contact therewith and hence to the direction of feed. The hammer-carrying arm "68 has adovvnward extension 72 clamped on the pivot stud I0 and to the lower end of this extension is attached a reciprocatory rod I4 extending 'frciihthe operating mechanism by which a fourmotion feed is imparted to the work in a direction a'wayfromthe operator and substantially parallel to the grooves 65 (Fig. 4) through timed reciprocatiohs of the rod I4 and oscillations of the sleeve 64. In other words, the right in Fig. l, the hammer 66 will grip the sole S against the anvil 60 and then the sleeve 64 will be rockedto carry the gripped work forwardly for a small fraction of an inch, after which the rod I4 will move to the left to release the work, ar id'the' rocking sleeve 64 will be swung back toward the observer ready for another feed cycle.

It will-be observed that the under face of the hammer 65 is provided with grooves parallel to "those in the upper face of the-anvil in order that "af'riy tendency of the oscillatory hammer to push the workdaterally away from itselfwill be re- "s'ist'ed. The hammer is also provided with a depending neck 18 having an arcuate surface l8 concentric with the axis of the pivot stud and against which the periphery of the work is rested 'tog'uide the Work and to assist in smoothing the peripheral edges which have been softened by the"-'action of the heat. At the same time, the pounding action of the hammer effects a consoli' canon of the softened edge. causing the superposed layers 80 (Fig. 6) of the plastic screening to 'o'eunited in a common edge portion 82 (Fig. "7). The anvil 60' is notched at 84 (Fig. 4) to receive the depending neck I6 of the hammer, and by making a close fit between the two there will be'noch'ance for threads of screening to be pushed down into the notch and caught there. Surrounding the anvil 60 is a removable work plate '06 to facilitate access to the hammer and anvil mechanism.

A presser foot 90 spring-pressed against the upper surface of the sole S'serves to compact the layers of material prior to the action of the heat upon the peripheral edges thereof. This presser foot is intermittently lifted in a manner, to be explained, during the forward feed of the work and then again grips the work to hold it during hammer, the return movement e'reof, and its downward movement to grip the when the rod I4 is moved to and provided With a lug work again. A support for this presser foot mechanism is provided by a forked bracket 92 (Fig. 3) having a hollow stem 94 which is clamped in the split outer end of the arm I4 by a pinch bolt 96 passing through lugs (not shown) on the arm. Up'on releasingth'is pinch bolt, in-and-out adjustment of this hollow stein- 94 is effected by a screw 98 (Fig. 1), while tilting adjustment of the forked bracket 92 and the stem about the axis ofthe stem is eifected by adjusting the set screws I00. Supported in the forked bracket is a pivot pin I 02 and, on this, there is carried an arm I04 which is held in adjusted position by set screws I05 and I0! engaging the bracket. On the arm I04 is a U-shaped upright casing I06 which provides a support for a square slide I08 in which the presser foot is yieldably mounted. Screws I09 entering a boss I II on the casing attach it to the arm. The slide I08 has a cylindrical recess to re. ceive an upstanding stem IIO on the presser foot 90 an'd'i's slotted at H2 in a boss H3 to receive a transverse retaining pin I carried by the stem. Abovethe stem I I0 of the presser foot and Within the slide I08 is a compression spring H4 urging the presser foot stem downwardly, within the limits of the slot II2, under a force regulated by an abutment screw H6 threaded in the slide I08. In order that the pressure on the foot 90 may be relieved at the desired intervals, a bell crank H8 is mounted on the pivot pin I02 and has a horizontal arm connected by a pitman I to another boss I 2l (Fig. 3) on the slide I08. The slide of thi's arm of the bell crank lies flush with the edges of the casing I06 (Fig. 3) and holds the slide I00 therein. The upright arm of the bell crank is joined to the head I2I (Fig. 3) of a rod I22 which, in the machine of the above-mentioned patent, is utilized for the operation of a shipping knife and is therein numbered I43.

In the modified form of the invention shown in Fig. 8, a driven lower feed roll I is journaied in a frame I32 on which there is supported a heatsupplying member I34 containing an electric unit I36 having-a. grooved face I38 to coact with the superposed edges of the plural layersof the Work S. Above this feed roll I 30 is another driven feed roll I40 carried by a shaft I42 which is jjournaled in a spring-pressed block I44. It will be noted that the upper roll I40 is offset to the left with respect to the lower roll, this providing space for a hammer I46 having a depending neck I40 to contact the edge of work supported on the lower roll I30 which serves also as an anvil". This hammer is supported'o'n a rod I50 which is guided in theframe for vertical reciprocation under the impulse of a pitman I52 dri vn by a crank I5'4' on a power-operated shaft I 56. It serves to consolidate the softened'ed'ges o'f' the layers compacted and fed forward by the rolls I30, l fe.

In the operation of the machine, a stack of layers '80 assembled with their broad faces in contact'an'd which have been previouslycut to-a sole-shaped design are presented beneath the presser foot of the machine and introduced between the hammer and anvn'untii the edge rests against the arcuate surface I8 upon the neck of the hammer. The'blast 'of'ho't fluid issuing from the nozzle 20 will then soften the plastic material, thelayerso'f whichw'ill be first compacted by the action of'the presser foot and then will be consolidated by the action of the hammer to form a homogeneous fjoin't along the edges of mcti'on feed "offered by the 'hammerand anvil.

As the edge of the work is rubbed by the neck of the hammer, it will tend to smooth ofi melted edge portions and, by using this neck as a gage, the work may readily be guided past the nozzle at a uniform distance therefrom. When the modified arrangement illustrated in Figs. 8 and 9 is employed, the action of the hammer I46 and its neck M8 will be comparable to that shown in Fig. 1 but, as will be understood, the feeding of the work will be eifected entirely by the superposed feed rolls I30, Hill. In this modified arrangement, the heat is not applied by a blast of fluid issuing from a nozzle but is derived from contact with the grooved surface I38 of the lug I36 to which heat is supplied by an enclosed electric unit.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine for smoothing the edge of plastic work materials, a work support, means for applying heat to the peripheral edge of the work to soften it, and intermittently operable compacting means comprising a hammer movable into engagement with the upper margin of the work, said hammer having a depending neck adjacent to the work-engaging surface of the hammer and against which the softened edge of the work is pressed to guide and smooth it.

2. In a machine for fusing the superposed edges of multi-layer plastic screen materials, a work support, an anvil positioned for oscillatory feeding movement beneath an opening in the work support, said anvil being notched, a hammer mounted for movement toward and away from the anvil and forwardly with it to feed the work, means for heating the peripheral edges of the work layers prior to their engagement by the hammer, and a depending neck upon the ham- 6 mer movable through the notch in the anvil, said neck serving as an abutment against which the edge of the work may be pressed to guide it as it is fed through the machine.

3. In a machine for consolidating the superposed edges of multi-layer plastic screen material, a heating device past which the peripheral edges of the work layers are moved to soften the material, and means for consolidating the softened material, comprising an anvil beneath the work and a hammer overlying the work and movable toward and away from the anvil, said hammer having a depending neck closely fitting against the adjacent edge of the anvil to prevent fibers of the material from being pinched between them, and serving as a guide for the periphery of the work.

JOSEPH FOSSA. LEO N. ISAACSON.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 132,338 Warden Oct. 15, 1872 834,467 Grafton Oct. 30, 1906 1,464,504 Fossa Aug. 14, 1923 1,661,572 MacDonald Mar. 6, 1928 1,702,598 Glass Feb. 19, 1929 2,014,469 Coffey Sept. 17, 1935 2,017,055 Doulette et al Oct. 15, 1935 2,087,971 Harrington, Jr. July 27, 1937 2,224,017 Gurwick Dec. 3, 1940 2,232,062 Gurwick Feb. 18, 1941 2,360,950 Kilgour Oct. 24, 1944 2,407,495 High Sept. 10, 1946 

